Follow focus system for use with film and cine-style lenses
Gear ratio of 1:2 is appropriate for a wide range of lens barrel sizes
Choice of three different focusing knobs (standard, hard stop, 2-speed)
Compatible with ARRI lightweight
support as a slide-on unit With adapter, compatible with studio rods 
systems 15 and 19mm Compatible with a wide range of ARRI 
driver gears and knob
accessories ARRI reversing gear set available for use with Nikon and Leica lenses
Economical and robust